KIWI Design has launched the K4 Duo, a brand-new audio and battery-integrated head strap designed for both the Meta Quest 3 and 3S. Known for enhancing comfort and extending play sessions, this latest strap features adjustable “all-in-one” audio speakers that can rotate into different positions for a personalized fit.
Officially named the K4 Duo AIO Audio Head Strap with Battery, the device allows users to easily switch between the built-in headset audio and the K4 Duo’s audio system via the USB-C connection. It’s a convenient plug-and-play solution aimed at immersive VR sessions with fewer cables and setup hassle.
The head strap includes two 2650mAh batteries, offering extended playtime while maintaining comfort. Weighing 459 grams, it carries over familiar design elements from KIWI’s previous models, including a rear adjustment dial, memory foam cushioning, top strap support, and the ability to charge both the headset and battery simultaneously.
While further hands-on testing is still needed to determine if it ranks among the best Quest 3 and 3S accessories, KIWI’s past products have been well-received—especially the K4 Boost Battery Strap, which was a top pick last year.
The K4 Duo is currently available with a launch price of $139.99, down from its regular price of $159.99.
